There is provided a device for printing an impression of both postal codes and postage stamps on envelopes which comprises a frame having a slot to receive an envelope so that the envelope is in position to be appropriately printed with an impression of a postal code and postage stamp. Sensors are provided within the slot to indicate when the envelope is appropriately positioned for printing an impression of the postal code and postage stamp. A printer is provided within the frame to print an impression of a predefined postal code in machine readable form and a variable postage amount subtracted from an electronic fund of stored postage on an envelope appropriately positioned within the slot. A keyboard on the frame enables the selecting of both a postal code and a postage amount. A CPU is associated with the keyboard and programmed to store the electronic postage fund and enable it to be appropriately added to with additional postage or subtracted from when an impression of the postage is printed on an envelope. The CPU also controls the operation of the printer so that an impression of a selected postage and postal code are printed on the envelope. The invention also envisages the adaptation of the device to receive bank credit cards to be read and financial transactions to be carried out by way of a telephone line, through communication with the device's CPU and a remote CPU.